Control lever



Sept. 12, 1950 J. E. BARTRUG CONTROL LEVER Filed NOV. 10, 1948 Jn'veniw (fi ms; 2 flaz iw fines! M operate.

Patented Sept. 12, 1950 UNITED; STATES v PAT EN CE V v CONTROL LEVER nice Edward-Booms, e t r Ci y. Iowa application November 10, 1948, Serial No. 59 ,214

ing rod, shaftor like against accidental or-objectionable longitudinal movement. 1 More specifically, the object of thisinvention tow s. (on. ass- 531) nor of attaching or place is not important. to this is to rovide a strong manually. operated: lever vfor controlling the reciprocating. movement of carburetor throttle rods of tractors and like A still further object of my invention is to pro.-

vide -a carburetor throttle lever that is capable of extremely fine adjustment.

A still further object. of my invention is to provide a. control level that is easy to release and .A still further object :of myinvention is toprowide a manuallycontrolled lever thatis economthose skilled; in theart.

My invention consists in the construction, arrangement, and combination-of th various parts ofuthe device, whereby the objects contemplated are attained as: hereinafter. more fullyset; forth, pointed. out in.- my: claims, and illustrated. in the accompanying drawings. in which:

Fig. l is a sideview=ot=smy device installed ancl in use.

Fig. 2. is a longitudinal sectional view of the devicetakenon lineJ-J-ofE-igx 1:.

Fig. 321s a cross--sectlona1 view of my control lever taken. on line 3--3'= of- Fig. l.

Control levers. are .old and found in most" all types. ofv machinery. Also. all. internal combustion engines have somemanuallyoperatedmeans for controlling the. carburetori setting; In the case. of tractors thismeans usually is" a rod of the; push and; pull type. Such. means lamest unsatisfactory becaus thevibration and. move-.-

ment of the tractor makes fine manuar'adlust- I ment almost impossible. Furthermore; themovement: of. the tractor over .uneven ground; :and the vibration of the-engine tends: techang' the positionof the throttle rod afterit has been adjusted. some attempthas been made toovercome this latter problem by providing holding notches, but. the objection. to notches. is: that line adj ustment is impossible.- I haveiovercome: such troubles by providing an easily operateds accurate and stablelevercontrol which I: will now T describe.

- The numeral: luzdesignates anysuitable-portion of. a. tractor frame; or: like. to; which my control may bQ'TSBC'Ll-I6d by aabolttor like ll. Theinaninvention provided it is in a'convenientlocation relative to the operator and in line with the carburetor throttle control rod l2. The numeral l3 designates the horizontal extendingbase strap portion secured at its forward end by the bolt H to the tractor frame or like. Extending above and from the center portion of this base strap is the segment M. This circular extending" portion I4 is flat when viewed from the rear or front and is similar to the strap base Hi. It extends in approximately one hundred and eighty d'e g-rees of are, as shown in Fig. 1. The numeral l5 designates a strap handle pivoted near its lower end to the center of the base strap by a bolt, rivet; or-Iikei6, as shown in Fig. 2. This strap extends upwardly from the left side of the base [3; along the leftside of the portion l4 and: then beyond thev portion M to form the grip portion l1. Holes l8 are provided in the lower end por tion of the strap handleand below the base strap 13 for-selectively: receiving theend of the throttle rod l2. These holes provide selection of greater or less stroke of the rod [2 relative to the handle strap I 5 and likewise greater or less leverage. An auxiliary strap I9 may be secured along the left-side of the strap handle to provide a carburetor handle to provide a carburetor throttle rod receiving hole 20 above the pivot point of the handle strap if desired. This may sometimes be preferred in certain situations,

and when used the movement of the rod l2 will bereversed relative to the movement of the lower end of the handle strap. The numeralizl designatesafriction bar pivoted at its lower end on the bolt Hi. This bar extends upwardly from the rightslde of the base strap and along and past the right side of the portion, asshown in Fig. 2-. By this arrangement the member. I5 and member. Z I extend at each side of-the portion M, respectively." They are heldtogether in parallel relationship by the two elongated bolts 22 and 23. The=bolt22 is within the arc of the portion I l and: the bolt .23 is beyond the arc of the portion I4. Besides the two portions I4 and 2|, the two bolts also loosely extend through a guard mem- "berlfi. 'I'his guard. member is to the left of'the strap handle'l'i. The numeral 25 designates a heavy: coil spring between the guard 24' and the strap. handle 15. As the. bolts limit the movement of theguard member 24-tothe left and the bar 2| to the right, this coil spring will yieldingly hold ,theistrap handle andthe bar toward each. other; thereby tightly clamping the are portion :lk between them-.2 The left and';right meral 28 designates a curved lever having its end pivoted in the member 26 and engaging the left end of the pin beyond its pivot point. The numeral 29 designates a handle lever pivoted in the member 26 and engaging the free endof the lever two ends integrally formed to said base strap portion, a strap lever having its lower portion pivoted to said base strap portion and extending upwardly adjacent one side of said flat circular member, a bar member pivoted at its lower end to said base strap portion and extending upwardly adjacent the other side of said flat circular member and parallel with said strap lever, a if's'pr'i'ngfretaining megfibfi a ifbolt extending through saidstrap lever, said bar member, and said retaining member, a coil spring between said *spring retaining member and said strap lever, and a'handle means for spreading said strap lever 28 beyond its pivot point. This compound 1everage makes the release of the clutch phase of my device manually easy. The numeral 30' desigthe side faces of the portion I4, as shown by dotted lines in Fig. 2. With the strap handle member and the bar 2| spread apart against the powerful action of the spring 25, the segment M will be free relative to the handle strap l5 and the handle unit may be ,moved forwardly or backwardly to actuate the throttle rod I2, as shown by dotted lines in Fig. 1. Any desired position of the handle unit may be had asno limiting notches are present. As soon as the desired fine adjustment is obtained, it is merel necessary to release pressure on the lever 29 to permit the pin 21 to move tothe left, permitting :the strong spring 25 to pull the members 15 and 2| together and clamp them on the. portion I4.

vWith the members |5- and 2| rigidly clamping onto the'portion I4, the throttle rod will be rigidly and permanently heldin the desired position until it is desired to 1 change it. This strong holding of. the. strap handle in the selected position will'not be affected by vibration or move? ment of the tractor. As any wear would have to be on the Wide sides of the segment I4 or wide sides or" the members l5 and 2|, the device Will last almost indefinitely. In fact theseportiOns could be Wornrelatively thin without' aifecting the proper functioning of the device. The desired clutch tension may be adjustably obtained by tightening or loosening the bolts 22 and-.23. Although I have described my device for. easy use in connection with carburetor control-rods,

it is obvious that it may be used wherever an accurate, fine adjustment of a rod member is desired, and-such an adjustmentafter attainment must be maintained under all conditions.-

Some changes may be made in the construction and arrangement of my control lever. without departing from the real spirit and purpose of my invention, and it'is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents which maybe of the class described, aisupporting member, a base strap .portion secured to said support member, a flat. circular member extendand said bar member away from each other and --against-theaction of said coil spring at times.

2. ,In a device ofthe class described, a supporting member, a base portion secured to said support member, a flat circular member extending above said base portion? and having its two ends integrally formed toesaidbase portion, a lever having its lower portion pivoted to said base portion: and extending .upwardly adjacent one side of said fiat circular member, a bar member pivoted at its lower end to said, baseportion and extendingupwardly adjacent the other side of said flat circular member and parallel-with said lever, a Spring retainingmember, a-boltextending through said lever, said bar member, and said retaining member, a coilspring, between said spring retainingmember and said. .leVer,. and a handle means for'spreading .said lever and said bar member away from each. other and against the action of said coilspring at times.

3. In a device of the class described, asupporting member, a base strap portion secured to said support member, a flat .circular member. extending above saidbase strap. portion andhaving its two ends integrally formed toLsaid basestrap portion, a strapilever; having its lower portion pivoted to said base strap portion and'extending upwardly adjacent one side of said :fiat circular member, azbar member pivoted at itszlower end to said base strap-portion and extendingupwardly adjacent the othersideof said flat circular member and .parallel withsaid strap lever, 9, spring retaining member, ,two bolts extending throughsaid Strap. lever, said bar. member, and said retaining member, a coil spring between said spring retaining member .and said strap lever, and a handle means for spreading said strap lever, and said bar member away from each other and against the action of said coil spring at times.

4; In a device of the class described, a supporting member, abase strapportion secured to said support -memloer,;a flat circular member extend-'- ing above :said base strap portion [and having its 'two ends integrally formed to said base strap portion, a straplever having its lower portion pivoted to said basestrap portion and extending upwardly adjacent. oneside of said flat circular member, .a barmember pivoted'at its lowerlend to said base strap" portion. and extending up-. wardly adjacent, the other. side of said flat circular member and parallelzwith said strap lever, a spring retaining member, a bolt extending through said strap-lever, said bar member, and said retainingmember, a coilspring between said spring retaining member and said strap lever, a pin slidably extending :through said strap lever and having one end bearing on the inner side of said bar member, a means for securing a control rodto said'straplever, and a manually operated cam means bearing on the other end'of said :pin and operatively secured; tojsaid. strap .lever.

5. In a device of the class described, a supporting member, a base strap portion secured to said support member, a flat circular member extending above said base strap portion and having its two ends integrally formed to said base strap portion, a strap lever having its lower portion pivoted to said base strap portion and extending upwardly adjacent one side of said fiat circular member, a bar member pivoted at its lower end to said base stnap portion and extending upwardly adjacent the other side of said fiat circular member and parallel with said strap lever, aspring retaining member, a bolt extendin through said strap lever, said bar member, and said retain ing member, a coil spring between saidspring retaining member and said strap lever, a pin slidably extending through said strap lever and having one end bearing on the inner side of said a spring means for yieldingly holding said sec- 0nd lever in normal operative position.

bar member, a means for securing a control rod to said strap lever, and a manually operated compound cam means bearing on the other end of said pin and operatively secured to said strap lever.

. 6. In a device of the class described, a supporting member, a base strap portion secured to said support member, a flat circular member extending above said base strap portion and having its two ends integrally formed to said base strap portion, a strap lever having its lower portion pivoted to said base strap portion and extending upwardly adjacent one side of said flat circular member, a bar member pivoted at its lower end to said base strap portion and extendin upwardly adjacent the other side of said flat circular member and parallel with said strap lever, a spring retaining member, a bolt extending through said strap lever, said bar member, and said retaining member, a coil spring between said spring retaining member and said strap lever, a pin slidab-ly extending through said strap lever and having one end bearing on the inner side of said bar member, a means for securing a control rod to said strap lever, a bearing on said strap 7. In a device of the class described, a member designed to be secured to [a support and having a base strap portion and a flat circular portion extending above it, a strap lever havin its lower portion pivoted to said base strap portion and eX- tending past and adjacent one side: of said flat circular portion, a bar member pivoted at its lower end to said base strap portion, and extending past and adjacent the other side of said fiat circular portion and parallel with said strap lever, a spring retaining member, a bolt extendin through said strap lever, said bar member, and said retaining member, a coil spring between said spring retaining member and said strap lever, and a handle means for spreading said strap lever and said bar member away from each other and against the action of said coil spring at times.

JAMES EDWARD BAR'I'RUG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Codlin June 19, 1945 

